android DRM

************warning************************ Do not apply if you are a software company located in India/Pak/Bangla region since based on my experience there is minimal correlation between claimed qualifications and actual skills (with rare exceptions). ******************************************** i need a protection system for ordinary android apps. Example: I have an app that shows photos of flowers from a collection. I have the source code, that opens in eclipse ADT. SECTION ONE (ECLIPSE ADT ANDROID): I need some code that I can add to this app, as the first activity. This first screen asks user to 1) enter serial number 2)gives link to buy a serial number (this is a separate website that opens in default browser 3) continue 24 hour trial. I need an activity that I can easily add to ANY android app that I make, thereby giving a 24 hour trial. If no serial number is entered, it will work only for 24 hours, after which it will show 'Your 24 hour trial has expired, please buy a license. So I need a first screen activity that I can add to any app. SECTION TWO:(PHP MYSQL) The app will connect to the license server and check to see if the license is valid and unused, and if so it will unlock the app. The admin (me) should be able to add lists of serial numbers to the license servers. And I will give those license numbers to the vendors who in turn will sell to customers. So , to summarize I need a DRM system that I can add to any android app I make, and it does a license check with the license server. So, features very similar to the features on the pdf app that you made for me, except that there is no pdfs involved. Please keep the bids realistic and reasonable. Preference to programmers who have worked with me before. Absolutely no bids from India/Pak/Bangla region.